18 Apr, 2026

Proton fixes Authenticator bug leaking TOTP secrets in logs

Proton fixed a bug in its new Authenticator app for iOS that logged users’ sensitive TOTP secrets in plaintext, potentially exposing multi-factor authentication codes if the logs were shared. Last week, Proton released a new Proton Authenticator app, which is a free standalone two-factor authentication (2FA) application for Windows, macOS, Linux, Android, and iOS. The app is used to […]

3 mins read

Proton launches free standalone cross-platform Authenticator app

Proton has launched Proton Authenticator, a free standalone two-factor authentication (2FA) application for Windows, macOS, Linux, Android, and iOS. 2FA authenticator apps are offline tools that generate time-based one-time passwords (TOTPs) that expire every 30 seconds, and which can be used alongside passwords when logging into online accounts, providing the second factor authentication. Proton is a […]

2 mins read